Crossing co-dominant morphs?

[sassy-pants]

And the same type of formula should be similar when refering to the rest of co-dominant morphs?

Yes, as long as each co-dom is only a co-dom, not a super.

Supers crossed with a co-dom will throw 50/50 whatever the super is (so super pastel will throw pastels)/combo of the two. Super x super will always give you the combination.